Integrate BACKBEAT SDK and resolve KACHING license validation

Major integrations and fixes:
- Added BACKBEAT SDK integration for P2P operation timing
- Implemented beat-aware status tracking for distributed operations
- Added Docker secrets support for secure license management
- Resolved KACHING license validation via HTTPS/TLS
- Updated docker-compose configuration for clean stack deployment
- Disabled rollback policies to prevent deployment failures
- Added license credential storage (CHORUS-DEV-MULTI-001)

Technical improvements:
- BACKBEAT P2P operation tracking with phase management
- Enhanced configuration system with file-based secrets
- Improved error handling for license validation
- Clean separation of KACHING and CHORUS deployment stacks

🤖 Generated with [Claude Code](https://claude.ai/code)

Co-Authored-By: Claude <noreply@anthropic.com>

vendor/github.com/francoispqt/gojay/encode_null.go

@@ -0,0 +1,39 @@
+package gojay
+
+// AddNull adds a `null` to be encoded. Must be used while encoding an array.`
+func (enc *Encoder) AddNull() {
+	enc.Null()
+}
+
+// Null adds a `null` to be encoded. Must be used while encoding an array.`
+func (enc *Encoder) Null() {
+	enc.grow(5)
+	r := enc.getPreviousRune()
+	if r != '[' {
+		enc.writeByte(',')
+	}
+	enc.writeBytes(nullBytes)
+}
+
+// AddNullKey adds a `null` to be encoded. Must be used while encoding an array.`
+func (enc *Encoder) AddNullKey(key string) {
+	enc.NullKey(key)
+}
+
+// NullKey adds a `null` to be encoded. Must be used while encoding an array.`
+func (enc *Encoder) NullKey(key string) {
+	if enc.hasKeys {
+		if !enc.keyExists(key) {
+			return
+		}
+	}
+	enc.grow(5 + len(key))
+	r := enc.getPreviousRune()
+	if r != '{' {
+		enc.writeByte(',')
+	}
+	enc.writeByte('"')
+	enc.writeStringEscape(key)
+	enc.writeBytes(objKey)
+	enc.writeBytes(nullBytes)
+}